using System;

using Org.BouncyCastle.Asn1;

namespace Org.BouncyCastle.Asn1.Ocsp
{
	public class ResponseBytes
		: Asn1Encodable
	{
		private readonly DerObjectIdentifier responseType;
		private readonly Asn1OctetString response;

		public static ResponseBytes GetInstance(
			Asn1TaggedObject	obj,
			bool				explicitly)
		{
			return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
		}

		public static ResponseBytes GetInstance(
			object obj)
		{
			if (obj == null || obj is ResponseBytes)
			{
				return (ResponseBytes)obj;
			}

			if (obj is Asn1Sequence)
			{
				return new ResponseBytes((Asn1Sequence)obj);
			}

			throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
		}

		public ResponseBytes(
			DerObjectIdentifier	responseType,
			Asn1OctetString		response)
		{
			if (responseType == null)
				throw new ArgumentNullException("responseType");
			if (response == null)
				throw new ArgumentNullException("response");

			this.responseType = responseType;
			this.response = response;
		}

		private ResponseBytes(
			Asn1Sequence seq)
		{
			if (seq.Count != 2)
				throw new ArgumentException("Wrong number of elements in sequence", "seq");

			this.responseType = DerObjectIdentifier.GetInstance(seq[0]);
			this.response = Asn1OctetString.GetInstance(seq[1]);
		}

		public DerObjectIdentifier ResponseType
		{
			get { return responseType; }
		}

		public Asn1OctetString Response
		{
			get { return response; }
		}

		/**
		 * Produce an object suitable for an Asn1OutputStream.
		 * <pre>
		 * ResponseBytes ::=       Sequence {
		 *     responseType   OBJECT IDENTIFIER,
		 *     response       OCTET STRING }
		 * </pre>
		 */
		public override Asn1Object ToAsn1Object()
		{
			return new DerSequence(responseType, response);
		}
	}
}
